Re: [Zope] TALES expression
Hi!
Please consider this TALES expression:
div class=DataPrevista tal:content='here/getDataInici | string:
nosta' /
If I try this other: div tal:content='string:${here/getDataInici}' /
the result is divNone/div
Then the first one will render the alternate expression isn't it?
Then with it renders div class=DataPrevista / ?
Thanks!
I don't understand what you are asking. Could you describe your question
more clear please.
Martijn.
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Re: [Zope] TALES expression
If this assuption is correct why the result is div class=DataPrevista /?
2008/7/16 Martijn Jacobs [EMAIL PROTECTED]:
That assumption is correct
I mean some TALES expression as here/getDataInici | string: nosta will
evaluate here/getDataInici and if this expression returns '', 0 or None the
tal interpreter evaluates the second one and the result of this TALES
expression will be nosta as string
Is this assumption correct?
Thanks!
2008/7/16 Martijn Jacobs [EMAIL PROTECTED]:
Hi!
Please consider this TALES expression:
div class=DataPrevista tal:content='here/getDataInici | string: nosta'
/
If I try this other: div tal:content='string:${here/getDataInici}' /
the result is divNone/div
Then the first one will render the alternate expression isn't it?
Then with it renders div class=DataPrevista / ?
Thanks!
I don't understand what you are asking. Could you describe your question
more clear please.
Martijn.
--
Martijn Jacobs
Four Digits, Internet Solutions
a: Willemsplein 15-1 6811 KB Arnhem NL kvk: 09162137 | btw:
8161.22.234.B01
e-mail: [EMAIL PROTECTED] | web: http://www.fourdigits.nl
tel: +31 (0)26 44 22 700 | fax: +31 (0)84 22 06 117
--
Mis Cosas
http://blogs.sistes.net/Garito
Zope Smart Manager
http://blogs.sistes.net/Garito/670
--
Martijn Jacobs
Four Digits, Internet Solutions
a: Willemsplein 15-1 6811 KB Arnhem NL
kvk: 09162137 | btw: 8161.22.234.B01
e-mail: [EMAIL PROTECTED] | web: http://www.fourdigits.nl
tel: +31 (0)26 44 22 700 | fax: +31 (0)84 22 06 117
--
Mis Cosas
http://blogs.sistes.net/Garito
Zope Smart Manager
http://blogs.sistes.net/Garito/670
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Re: [Zope] TALES expression
Garito wrote:
Hi!
Please consider this TALES expression:
div class=DataPrevista tal:content='here/getDataInici | string: nosta' /
If I try this other: div tal:content='string:${here/getDataInici}' /
the result is divNone/div
Then the first one will render the alternate expression isn't it?
Then with it renders div class=DataPrevista / ?
Сто? ;-)
You should check the tales documentation. the pipe symbol |
means a logical or, in effect if the left expression resolves
to non existent, None, empty object,... (generally python False)
the right part of it is evaluated.
In the special case it probably is nicer to use:
div class=DataPrevista tal:content=here/getDataInici |
defaultnosta/div instead so the fallback value is part
of the template (TAL is meant to be design by example)
I would also recommend not mixing and ' for attributes and
maybe in the long run sticking to english language names for
your objects makes it easier to ask on mailinglists.
Regards
Tino
smime.p7s
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Re: [Zope] TALES expression
On Wed, Jul 16, 2008 at 6:34 AM, Tino Wildenhain [EMAIL PROTECTED] wrote: You should check the tales documentation. the pipe symbol | means a logical or, in effect if the left expression resolves to non existent, None, empty object,... (generally python False) the right part of it is evaluated. Not at all. The pipe uses the left-hand operand if it is defined; a value of None or an empty string is still a defined value. As long as here can be traversed with the name getDataInici then the left-hand expression will be used. If that traversal fails the right-hand expression will be used instead. -Fred -- Fred L. Drake, Jr. fdrake at gmail.com Chaos is the score upon which reality is written. --Henry Miller ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] TALES expression
Fred Drake wrote: On Wed, Jul 16, 2008 at 6:34 AM, Tino Wildenhain [EMAIL PROTECTED] wrote: You should check the tales documentation. the pipe symbol | means a logical or, in effect if the left expression resolves to non existent, None, empty object,... (generally python False) the right part of it is evaluated. Not at all. The pipe uses the left-hand operand if it is defined; a value of None or an empty string is still a defined value. As long as here can be traversed with the name getDataInici then the left-hand expression will be used. If that traversal fails the right-hand expression will be used instead. Indeed :-) Cheers Tino smime.p7s Description: S/MIME Cryptographic Signature ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
